Heimer



(No Model.) 2 Sheets-Sheet 1.

F. O. LINDHEIMER.

MILL.

No; 426,598. Patented Apr. 29, 1890.

, UNITED STATES PATENT OFFIC FRIEDRICH OTTO LINDHEIMER, OF FRANKFORT-ON-THE-MAIN, PRUSSIA, GERMANY.

MILL.

SPECIFICATION forming part of Letters Patent No. 426,598, dated April 29, 1890.

Application filed April 30,1888. Serial No. 272,512. (No model.) Patented in Belgium December 15, 1887, No. 79,645. and J entry 31, 1888, No. 80,822; in Germany January 13,1888,No.45,681; in France February 10, 1888, No. 187,499, and in England April 24,1888, No. 6,101.

To ctZZ whom it may concern:

Be it known that I, FRIEDRICH Orro LIND- HEIMER, of Frankfort-on-the-Main, in the Kingdom of Prussia and German Empire, have invented new and useful Improvements in Mills for Crushing, Grinding, or Oomminutin g Ores, Grain, or other Produce or Materials, (improvements of the application Serial No. 257,272, filed December 8, 1887,) of which the following is a specification, reference being and therein to the accompanying drawings, no patents being obtained by me anywhere for this invention, save in France, No: 187,499, dated February 10, 1888; Belgium, No. 79,645, December 15, 1887, and No. 80,322, dated J anuary 81, 1888; in Germany, January 13, 1888, No. 45,681, and in Great Britain, April 24, 1888, No. 6,101.

My invention relates to that class of grinding-mills in which the grinding-surfaces are composed of fiat-faced blocks or plates, and are reciprocated, relatively, to each other, the invention consisting in a novel means whereby the adjustment of the grinding-surfaces is effected.

In the drawings, Figure 1 is a face view of my improved grinding-mill; Fig. 2, a similar view illustrating a slightly-difierent arrangement; Fig. 3, a top plan view of the machine represented in Fig. 2, and Fig. 4 a side elevation of the same.

A and B indicate the grinding blocks or plates, which are arranged with their fiat faces close together. The blocks A are supported at their ends upon or by a transverse frame C,while the blocks or plates B are supported at their opposite ends by the frame D, as clearly shown in Fig. 1. These frames Oand D are mounted upon or supported by wheels E or in any other suitable or equivalent manner, in order that they may receive a reciproeating motion in the direction of the length of the blocks or plates, the frames moving back and forth alternately in opposite directions.

In the construction shown in Fig. 2, the grinding-blocks A are shown as hinged or pivoted at their upper edges at each end to a bar F, while the blocks B are similarly hinged or this arrangement are hinged or pivoted to the respective frames C D, and each is adapted to be raised and lowered by means of a pinion H, engaging a curved rack-bar I, secured to the bars, the pinion being secured to a shaft J, having a hand-wheel K, and prevented from turning backward accidentally by means. of

a pawl L. There are four of the bars F G, one at each end of the blocks A and one at each end of the blocks B whereby both ends of each set of blocks will be raised and lowered uniformly. Now when the blocks are in the position represented by the full lines in Fig. 2 they will be found to be separated the maximum distance; but when the bar F (or G) is raised, as indicated by the dotted lines in Fig. 2, the blocks will gradually approach one another, the regulation or adjustment of the grinding-surfaces being controlled by the raising and lowering of the bar. Each of the bars F G is provided with an extension M, which is adapted to be clamped or otherwise secured to a perforated upright N, formed upon the frames 0 D, in order that the adj ustment may not be varied accidentally during the reciprocation of the frames carrying the grinding blocks or plates.

In the construction illustrated in Fig. 1, the blocks A and B are pivoted not only at their upper ends to the adjustingbars F G, but are likewise secured at their lower edges to the frames 0 D, so that instead of lifting the adjusting-bars F G said bars will be moved longitudinally. This movement of the bars produces the same variations in adjustment as are secured by the pivoted bars, and in order that this adjustment may not be changed during the operation of the machine, set-screws O O are employed to bear upon and clamp the bars.

Either of the frames 0 D may be fixed and the other reciprocated, or, if desired, both of the frames 0 and D may be reciprocated alternately in opposite directions. As the frame or frames reciprocate in the direction of the length o'f-the grinding blocks or plates, the

latter will move with the frames and grind the material fed in between them.

The present invention relates only to means for adjusting the grinding-surfaces toward and from one another, and as these means may obviously be varied considerably in construction and arrangement without in any manner departing from the spirit of my invention, I wish it understood that I do not limit myself to the precise construction and arrangement of the adjusting -bar herein shown.

Having thus described my inventiomwhat -.I claim is- 1. In combination with two frames and means for reciprocating one (or both) of them, a bar or plate carried by each frame,aseries of grinding-blocks hinged or pivoted to each of the bars and arranged with their flat faces. close together, and means, substantially such as shown, for varying the position of the bar, whereby the blocks of the two sets of grinding-surfaces may be adjusted toward and from each other.

2. In combination with two frames and means for reciprocating one (or both) of them relatively to the other, two series of grinding-bloeks, one hinged or pivoted at their lower ends to one frame and the second series similarly hinged or pivoted to the other frame,

the blocks and provided with a rack-bar, anda shaft provided with a hand wheel and pinion.

4:. In combination with the reciprocatingframes having an upright,the grinding-blocks, the adj usting-bar arranged and operating substantially as shown, and provided with an extension, and means for locking the extension of the bar to the upright.

5. In combination with two reciprocating frames, blockssupported at their ends upon their respective frames, apair of bars for each frame, to which the upper ends of the grinding-blocks are pivoted or hinged, secured to the frames and moving therewith, and means, substantially such as shown, for adjusting 'the bars and varying the space between the grinding-blocks.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

FRIEDRICH OTTO LINDHEIMER.

WVitnesses:

ALvnsro P. HOGUE, JEAN GR ND. 

